/*
 * Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file is distributed
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language governing
 * permissions and limitations under the License.
 
 * According to cos feature, we modify some class，comment, field name, etc.
 */


package com.qcloud.cos.event;

import com.qcloud.cos.transfer.PersistableTransfer;

/**
 * COS specific progress listener chain.
 */
public class COSProgressListenerChain extends ProgressListenerChain implements COSProgressListener {

    /**
     * Create a listener chain that directly passes all the progress events to the specified
     * listeners.
     * 
     * @param listeners only listeners of type {@link COSProgressListener} will be notified with the
     *        COS transfer events.
     */
    public COSProgressListenerChain(ProgressListener... listeners) {
        super(listeners);
    }

    @Override
    public void onPersistableTransfer(PersistableTransfer persistableTransfer) {
        for (ProgressListener listener : getListeners()) {
            if (listener instanceof COSProgressListener) {
                COSProgressListener cosListener = (COSProgressListener) listener;
                cosListener.onPersistableTransfer(persistableTransfer);
            }
        }
    }

}
